Checkline MX-3 - Manual (Page 21)

MX-3 Ultrasonic Thickness Gauge
17
Scan Mode
While the MX-3 excels at making single point measurements, it is
sometimes desirable to examine a larger region, searching for the thinnest
point. The MX-3 includes a feature, called Scan Mode, which allows it to
do just that.
In normal operation, the MX-3 performs and displays four
measurements every second, which is quite adequate for single
measurements. In Scan Mode, however, the gauge performs sixteen
measurements every second. While the transducer is in contact with the
material being measured, the MX-3 is keeping track of the lowest
measurement it finds. The transducer may be "scrubbed" across a surface,
and any brief interruptions in the signal will be ignored. When the
transducer loses contact with the surface for more than a second, the MX-3
will display the smallest measurement it found.
When the MX-3 is not in calibration mode, press the UP arrow key to
turn Scan Mode on and off. A brief message will appear in the display
confirming the operation. When the transducer is removed from the
material being scanned, the MX-3 will (after a brief pause) display the
smallest measurement it found.